Html representation of processor and metadata in notebooks (#395)

* basics for repr for metadata and processor class

* basics for repr for metadata and processor class

* metadata pretty html representation

* fix linting/test errors

* idea for plots

* apply some fixes

* remove yaml dump

* put back metadata property

* add tests for metadata

sed/core/metadata.py

@@ -1,6 +1,6 @@
 """This is a metadata handler class from the sed package
-
 """
+import json
 from copy import deepcopy
 from typing import Any
 from typing import Dict
@@ -9,7 +9,8 @@
 
 
 class MetaHandler:
-    """[summary]"""
+    """This class provides methods to manipulate metadata dictionaries,
+    and give a nice representation of them."""
 
     def __init__(self, meta: Dict = None) -> None:
         self._m = deepcopy(meta) if meta is not None else {}
@@ -18,13 +19,35 @@ def __getitem__(self, val: Any) -> None:
         return self._m[val]
 
     def __repr__(self) -> str:
-        # TODO: #35 add pretty print, possibly to HTML
-        return str(self._m)
+        return json.dumps(self._m, default=str, indent=4)
+
+    def _format_attributes(self, attributes, indent=0):
+        INDENT_FACTOR = 20
+        html = ""
+        for key, value in attributes.items():
+            # Format key
+            formatted_key = key.replace("_", " ").title()
+            formatted_key = f"<b>{formatted_key}</b>"
+
+            html += f"<div style='padding-left: {indent * INDENT_FACTOR}px;'>"
+            if isinstance(value, dict):
+                html += f"<details><summary>{formatted_key} [{key}]</summary>"
+                html += self._format_attributes(value, indent + 1)
+                html += "</details>"
+            elif hasattr(value, "shape"):
+                html += f"{formatted_key} [{key}]: {value.shape}"
+            else:
+                html += f"{formatted_key} [{key}]: {value}"
+            html += "</div>"
+        return html
+
+    def _repr_html_(self) -> str:
+        html = self._format_attributes(self._m)
+        return html
 
     @property
-    def metadata(self) -> dict:
+    def metadata(self) -> Dict:
         """Property returning the metadata dict.
-
         Returns:
             dict: Dictionary of metadata.
         """
@@ -85,83 +108,17 @@ def add(
                 f"Please choose between overwrite,append or raise.",
             )
 
-    def add_processing(self, method: str, **kwds: Any) -> None:
-        """docstring
-
-        Args:
-
-        Returns:
-
-        """
-        # TODO: #36 Add processing metadata validation tests
-        self._m["processing"][method] = kwds
-
-    def from_nexus(self, val: Any) -> None:
-        """docstring
-
-        Args:
-
-        Returns:
-
-        """
-        raise NotImplementedError()
-
-    def to_nexus(self, val: Any) -> None:
-        """docstring
-
-        Args:
-
-        Returns:
-
-        """
-        raise NotImplementedError()
-
-    def from_json(self, val: Any) -> None:
-        """docstring
-
-        Args:
-
-        Returns:
-
-        """
-        raise NotImplementedError()
-
-    def to_json(self, val: Any) -> None:
-        """docstring
-
-        Args:
-
-        Returns:
-
-        """
-        raise NotImplementedError()
-
-    def from_dict(self, val: Any) -> None:
-        """docstring
-
-        Args:
-
-        Returns:
-
-        """
-        raise NotImplementedError()
-
-    def to_dict(self, val: Any) -> None:
-        """docstring
-
-        Args:
-
-        Returns:
-
-        """
-        raise NotImplementedError()
-
 
 class DuplicateEntryError(Exception):
-    """[summary]"""
+    """Exception raised when attempting to add a duplicate entry to the metadata container.
+
+    Attributes:
+        message -- explanation of the error
+    """
 
+    def __init__(self, message: str = "An entry already exists in metadata"):
+        self.message = message
+        super().__init__(self.message)
 
-if __name__ == "__main__":
-    m = MetaHandler()
-    m.add({"start": 0, "stop": 1}, name="test")
-    print(m)
+    def __str__(self):
+        return f"{self.__class__.__name__}: {self.message}"

sed/core/processor.py

@@ -175,13 +175,38 @@ def __init__(
 
     def __repr__(self):
         if self._dataframe is None:
-            df_str = "Data Frame: No Data loaded"
+            df_str = "Dataframe: No Data loaded"
         else:
             df_str = self._dataframe.__repr__()
-        attributes_str = f"Metadata: {self._attributes.metadata}"
-        pretty_str = df_str + "\n" + attributes_str
+        pretty_str = df_str + "\n" + "Metadata: " + "\n" + self._attributes.__repr__()
         return pretty_str
 
+    def _repr_html_(self):
+        html = "<div>"
+
+        if self._dataframe is None:
+            df_html = "Dataframe: No Data loaded"
+        else:
+            df_html = self._dataframe._repr_html_()
+
+        html += f"<details><summary>Dataframe</summary>{df_html}</details>"
+
+        # Add expandable section for attributes
+        html += "<details><summary>Metadata</summary>"
+        html += "<div style='padding-left: 10px;'>"
+        html += self._attributes._repr_html_()
+        html += "</div></details>"
+
+        html += "</div>"
+
+        return html
+
+    ## Suggestion:
+    # @property
+    # def overview_panel(self):
+    #     """Provides an overview panel with plots of different data attributes."""
+    #     self.view_event_histogram(dfpid=2, backend="matplotlib")
+
     @property
     def dataframe(self) -> Union[pd.DataFrame, ddf.DataFrame]:
         """Accessor to the underlying dataframe.
@@ -238,13 +263,13 @@ def timed_dataframe(self, timed_dataframe: Union[pd.DataFrame, ddf.DataFrame]):
         self._timed_dataframe = timed_dataframe
 
     @property
-    def attributes(self) -> dict:
+    def attributes(self) -> MetaHandler:
         """Accessor to the metadata dict.
 
         Returns:
-            dict: The metadata dict.
+            MetaHandler: The metadata object
         """
-        return self._attributes.metadata
+        return self._attributes
 
     def add_attribute(self, attributes: dict, name: str, **kwds):
         """Function to add element to the attributes dict.

tests/test_metadata.py

@@ -0,0 +1,75 @@
+import json
+from typing import Any
+from typing import Dict
+
+import numpy as np
+import pytest
+
+from sed.core.metadata import DuplicateEntryError
+from sed.core.metadata import MetaHandler
+
+metadata: Dict[Any, Any] = {}
+metadata["entry_title"] = "Title"
+# sample
+metadata["sample"] = {}
+metadata["sample"]["size"] = np.array([1, 2, 3])
+metadata["sample"]["name"] = "Sample Name"
+
+
+@pytest.fixture
+def meta_handler():
+    # Create a MetaHandler instance
+    return MetaHandler(meta=metadata)
+
+
+def test_add_entry_overwrite(meta_handler):
+    # Add a new entry to metadata with 'overwrite' policy
+    new_entry = {"sample": "Sample Name"}
+    meta_handler.add(new_entry, "sample", duplicate_policy="overwrite")
+    assert "sample" in meta_handler.metadata
+    assert meta_handler.metadata["sample"] == new_entry
+
+
+def test_add_entry_raise(meta_handler):
+    # Attempt to add a duplicate entry with 'raise' policy
+    with pytest.raises(DuplicateEntryError):
+        meta_handler.add({}, "entry_title", duplicate_policy="raise")
+
+
+def test_add_entry_append(meta_handler):
+    # Add a new entry to metadata with 'append' policy
+    new_entry = {"sample": "Sample Name"}
+    meta_handler.add(new_entry, "sample", duplicate_policy="append")
+    assert "sample" in meta_handler.metadata
+    assert "sample_1" in meta_handler.metadata
+    assert meta_handler.metadata["sample_1"] == new_entry
+
+
+def test_add_entry_merge(meta_handler):
+    # Add a new entry to metadata with 'merge' policy
+    entry_to_merge = {"name": "Name", "type": "type"}
+    meta_handler.add(entry_to_merge, "sample", duplicate_policy="merge")
+    print(meta_handler.metadata)
+    assert "sample" in meta_handler.metadata
+    assert "name" in meta_handler.metadata["sample"]
+    assert "type" in meta_handler.metadata["sample"]
+
+
+def test_repr(meta_handler):
+    # Test the __repr__ method
+    assert repr(meta_handler) == json.dumps(metadata, default=str, indent=4)
+
+
+def test_repr_html(meta_handler):
+    # Test the _repr_html_ method
+    html = meta_handler._format_attributes(metadata)
+    assert meta_handler._repr_html_() == html
+
+    html_test = "<div style='padding-left: 0px;'><b>Entry Title</b> [entry_title]: Title</div>"
+    html_test += (
+        "<div style='padding-left: 0px;'><details><summary><b>Sample</b> [sample]</summary>"
+    )
+    html_test += "<div style='padding-left: 20px;'><b>Size</b> [size]: (3,)</div>"
+    html_test += "<div style='padding-left: 20px;'><b>Name</b> [name]: Sample Name"
+    html_test += "</div></details></div>"
+    assert html == html_test

tests/test_processor.py

@@ -189,11 +189,11 @@ def test_attributes_setters() -> None:
         processor.dataframe["X"].compute(),
         processor.dataframe["Y"].compute(),
     )
-    processor_metadata = processor.attributes
+    processor_metadata = processor.attributes.metadata
     assert isinstance(processor_metadata, dict)
     assert "test" in processor_metadata.keys()
     processor.add_attribute({"key2": 5}, name="test2")
-    assert processor.attributes["test2"]["key2"] == 5
+    assert processor_metadata["test2"]["key2"] == 5
     assert processor.config["core"]["loader"] == "mpes"
     assert len(processor.files) == 2
 
@@ -398,7 +398,7 @@ def test_pose_adjustment_save_load() -> None:
     processor.apply_momentum_correction()
     assert "Xm" in processor.dataframe.columns
     assert "Ym" in processor.dataframe.columns
-    assert "momentum_correction" in processor.attributes
+    assert "momentum_correction" in processor.attributes.metadata
     os.remove("sed_config_pose_adjustments.yaml")
 
 
@@ -609,7 +609,10 @@ def test_energy_calibration_workflow(energy_scale: str, calibration_method: str)
         processor.add_energy_offset(constant=1)
     processor.append_energy_axis(preview=False)
     assert "energy" in processor.dataframe.columns
-    assert processor.attributes["energy_calibration"]["calibration"]["energy_scale"] == energy_scale
+    assert (
+        processor.attributes.metadata["energy_calibration"]["calibration"]["energy_scale"]
+        == energy_scale
+    )
     os.remove(f"sed_config_energy_calibration_{energy_scale}-{calibration_method}.yaml")
 
     energy1 = processor.dataframe["energy"].compute().values
@@ -743,11 +746,14 @@ def test_delay_calibration_workflow() -> None:
     processor.calibrate_delay_axis()
     assert "delay" in processor.dataframe.columns
     assert (
-        processor.attributes["delay_calibration"]["calibration"]["creation_date"]
+        processor.attributes.metadata["delay_calibration"]["calibration"]["creation_date"]
         == creation_date_calibration
     )
     processor.add_delay_offset(preview=True)
-    assert processor.attributes["delay_offset"]["offsets"]["creation_date"] == creation_date_offsets
+    assert (
+        processor.attributes.metadata["delay_offset"]["offsets"]["creation_date"]
+        == creation_date_offsets
+    )
     np.testing.assert_allclose(expected, processor.dataframe["delay"].compute())
     os.remove("sed_config_delay_calibration.yaml")
 
@@ -819,9 +825,12 @@ def test_add_time_stamped_data() -> None:
     res = processor.dataframe["time_stamped_data"].compute().values
     assert res[0] == 0
     assert res[-1] == 1
-    assert processor.attributes["time_stamped_data"][0] == "time_stamped_data"
-    np.testing.assert_array_equal(processor.attributes["time_stamped_data"][1], time_stamps)
-    np.testing.assert_array_equal(processor.attributes["time_stamped_data"][2], data)
+    assert processor.attributes.metadata["time_stamped_data"][0] == "time_stamped_data"
+    np.testing.assert_array_equal(
+        processor.attributes.metadata["time_stamped_data"][1],
+        time_stamps,
+    )
+    np.testing.assert_array_equal(processor.attributes.metadata["time_stamped_data"][2], data)
 
 
 def test_event_histogram() -> None: